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A Madagascar reed frog (Heterixalus madagascariensis) at the Plzen Zoo. PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
A near threatened albino streamside salamander (Ambystoma barbouri) at Cincinnati Zoo. PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
A rare pebas stubfoot toad (Atelopus spumarius) at the Catholic University of Ecuador. PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
Metamorphosis of a roque treefrog, (Hyloscirtus phyllognathus). PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
Juvenile Stolzmann's horned frogs, (Ceratophrys stolzmanni). PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
A marbled newt (Triturus marmoratus) at Conservation Fisheries. PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
A leopard-bellied scrub toad (Ollotis signifera) at Atlanta zoo. PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
A Pearse's mudskipper (Periophthalmus novemradiatus) at the Newport Aquarium. PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
An oriental fire bellied toad (Bombina orientalis) at Denver Zoo. PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
An axolotl (Ambystoma mexicanum) at the Detroit Zoo. PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
A pair of evergreen toads (Incilius coniferus or Bufo coniferus) at Atlanta Zoo. PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
A rough-skinned newt (Taricha granulosa) at Oregon Zoo. PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
A great plains toad (Anaxyrus cognatus) at the Phoenix City Zoo. PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
A redback salamander (Plethodon cinereus) at the National Mississippi River Museum and Aquarium. PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
A Malaysian golden gliding frog, (Polypedates leucomystax). PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
A slimy salamander (Plethodon glutinosus glutinosus) at Toledo Zoo. PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
A Malaysian horned leaf frog, (Megophrys nasuta). PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
Blotched or banded tiger salamanders (Ambystoma tigrinum melanostictum) at the National Mississippi River Museum and Aquarium. PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
A male white-spotted glass frog (Sachatamia albomaculata) at the Atlanta Zoo. PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
A northern banana salamander, (Bolitoglossa rufescens). PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
Budgett's Frog (Lepidobatrachus laevis) at the National Aquarium in Baltimore. PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
A blue-tailed fire-bellied newt, (Cynops cyanurus). PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
A pink-sided treefrog (Agalychnis litodryas) at the Catholic University of Ecuador. PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |
An ensatina salamander, (Ensatina eschscholtzii eschscholtzii). PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK![]() |